Is this a fuel feed or return pipe?

[LeoZwalf]

The disconnected pipe being held by my freezing hand on the photo connects to the fuel rail on the opposite end of the pressure regulator.

Is it the feed or return pipe?

Car is a 1991 BX GTi.

[Captain Muppet]

The regulator end is normally the return as fuel is being bled off by the regulator to regulate the pressure.

That said, it's a Citroen, and I've had enough of those to expect weirdness.

[LeoZwalf]

Thanks Cap'n, that was my thought as well.

I've only had this thing a month or so and can feel the feduppedness arriving :-|

[Krikkit]

Disconnect both, get two bottles and stick the hoses in. Turn on the ignition so the fuel pump is trying to prime, then whichever bottle has fuel is the feed.

[Captain Muppet]

LeoZwalf said:

Thanks Cap'n, that was my thought as well.

I've only had this thing a month or so and can feel the feduppedness arriving :-

Get it working and embrace the weirdness I used to love raising and lowering the suspension on the BX at traffic lights. It was only an 19RD, I'd have killed to get to drive a GTi back then.

Although obviously I'm too scared of it being broken all the time to buy one now...

[LeoZwalf]

Krikkit said:

Disconnect both, get two bottles and stick the hoses in. Turn on the ignition so the fuel pump is trying to prime, then whichever bottle has fuel is the feed.

Done that (well, one at a time) and neither spew petrol when cranking the engine over. I suspect this may be the source of my problem...!

[aw51 121565]

It's a GTI so will have an electric fuel pump which will - SHOULD - prime when the ignition is switched on - no need to crank the engine . You may be able to hear the fuel pump when the ignition is first turned on (try lifting the rear seat base to make it easier to hear), then a click (from the fusebox area) as the fuel pump is switched off automatically after a few seconds if the engine hasn't been started.

No fuel from either of the two pipes you've located when switching the ignition on indicates a blown fuel pump fuse, dodgy connection, dubious wiring or duff pump; good luck .